U1 · Design foundations in the real app: tokens, DM Sans, Lucide + status glyphs, primitives (from the PAR-400 prototype)

UI foundation step 1. Depends on PAR-409 (layout move). It can run in parallel with the architecture foundation (A2–A5). Implements PAR-358, PAR-359, PAR-360 (as revised: own task-box glyphs), PAR-393, PAR-395 and the primitives half of PAR-361.

Source of truth: packages/tasklie-design-system/src/redesign/, meaning _theme.scss, redesign.module.scss, primitives.tsx and the Storybook stories. The design rules are in the root CLAUDE.md.

Do

• Tokens: replace the layer 2/3 values in src/styles/_theme.scss with the redesign tokens.
  • Dark is the default, light a preference. Emerald accent, green-cast neutrals.
  • Type scale 11/12/13/14/16/20/24/32. Weights 400/500/560 (--w-strong).
  • Radii, elevation and the glow.
  • Keep the token contrast test passing, and update its expected palette.
• Fonts: DM Sans through @fontsource-variable/dm-sans/opsz.css (or next/font/local on the same files). Set font-optical-sizing: auto. Use JetBrains Mono for code only.
• Icons:
  • Replace DS/Icon with a wrapper over lucide-react (stroke 1.75, 16px default), keeping the name-based API for existing callers.
  • Add the custom glyphs as DS components: StatusIcon (the task-box family), the Discord and GitHub logos, and segmented Progress.
  • Replace text glyphs used as icons (← ↗ → ✕ { } ·).
• Primitives: promote from the prototype into real DS components, with stories and a11y tests:
  • Button (primary with glow / secondary / ghost / danger, three sizes), IconButton, Kbd
  • LabelChip (colour wash), Pill, Vote, Avatar (with the ghost variant), EnvBadge, Pipeline
  • Toggle, Field / Input / InputGroup, SettingsRow
  • Skeleton (shimmer, reduced-motion aware)
• Retire the old priority badge and signal bars from rendering (rule: no priority icons).
• Don't restyle screens yet. Existing screens will pick up the new tokens automatically. Fix only what visibly breaks.
• Default theme: existing users' stored preference wins; new users get dark.

Acceptance

• Story a11y passes, the token tests pass, and lint, typecheck and tests pass.
• The app renders in dark, emerald and DM Sans on dev, with no broken screens. Attach before/after screenshots at 2× to the PR.